Petaluma's best loved event returns for its 31st year! This year's theme will celebrate our River heritage with "River of Dreams: Then & Now ". Watch over 110 units march through Downtown Petaluma, enjoy food and drink, music, arts and crafts and an area just for kids! Come early to watch the Cow Chip tossing contest, The Cutest Lil Chick Contest & the kids' Pre-Parade.